docs: def save(self, *args, **kwargs):
          '''
          If this is an HTML template, then set the non-HTML content to be the stripped version of the HTML.
          If this is a plain text template, then set the HTML content to be null.
          '''
          if self.send_html:
              self.content = get_text_for_html(self.html_content)
          else:
              self.html_content = None
  
          super(EmailTemplate, self).save(*args, **kwargs)